US4135661A - Control device for a valve actuator - Google Patents

Control device for a valve actuator Download PDF

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Publication number
US4135661A
US4135661A US05/668,805 US66880576A US4135661A US 4135661 A US4135661 A US 4135661A US 66880576 A US66880576 A US 66880576A US 4135661 A US4135661 A US 4135661A
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US
United States
Prior art keywords
shafts
shaft
rotatable
indicating
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/668,805
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English (en)
Inventor
Umberto Filippini
Pierluigi Bianchini
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Nuovo Pignone SpA
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Nuovo Pignone SpA
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Publication date
Application filed by Nuovo Pignone SpA filed Critical Nuovo Pignone SpA
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/14—Design features of general application for transferring a condition from one stage to a higher stage
    • G06M1/16—Design features of general application for transferring a condition from one stage to a higher stage self-operating, e.g. by Geneva mechanism
    • G06M1/166—Design features of general application for transferring a condition from one stage to a higher stage self-operating, e.g. by Geneva mechanism with dials, pointers or similar type indicating means

Definitions

  • This invention relates to a device for indicating the number of revolutions by a rotatable member, such as a valve actuator.
  • the device provides a digital indication of the revolutions made by the actuator starting from a zero setting.
  • the device also actuates one or more sets of electric contacts, each of which can be preset independently of the other ones to operate at a predetermined digital indication.
  • Known control devices for actuators provide a rather gross indication of the position of the valve actuator. As a matter of fact, this position is indicated either by a pointer which is rotatable about a dial or by luminous signals indicating total closure or opening of the valve actuator.
  • this position is indicated either by a pointer which is rotatable about a dial or by luminous signals indicating total closure or opening of the valve actuator.
  • FIG. 1 is a top view of the control device comprising the present invention
  • FIG. 2 is a view taken along the line A--A of FIG. 1;
  • FIG. 3 is a front elevational view of the device of FIG. 1 with portions shown in phantom.
  • the device essentially comprises four rotary shafts: With shaft 1 receiving the drive directly from an actuator not shown, since it is connected with the rotary central group thereof, by a constant mesh gear couple.
  • the driving ratio can be varied according to the particular application in such a way that a revolution of the actuator corresponds to one revolution, a plurality of revolutions or only a fraction of a revolution of the shaft 1.
  • the shaft 2 is driven in direct drive with a driving ratio of 1:1 by the shaft 1 through the gears 8.
  • the unit disc 5 is integrally mounted on the shaft 2 .
  • the shaft 3 is driven by the shaft 2 through the gears 8, at a ratio of one step corresponding to one tenth of a revolution for each complete revolution of the shaft 2.
  • the shaft 4 is driven by the shaft 3 through the gears 8, at a ratio of one step corresponding to one tenth of a revolution for each complete revolution of the shaft 3.
  • the hundreds disc 7 is integrally mounted on shaft 4.
  • the set of the three digits forms a number which is proportional to the number of revolutions of the shaft 1, a number which, in turn, is proportional to the number or revolutions made by the actuator starting from an initial 000 condition.
  • the read out number is also an index of the position of the apparatus not shown as actuated by the actuator.
  • the second function of the present invention is the actuation of the four sets of electric contacts 17, 18, 19, 20, each of them being capable of operation independently of the others, when a predetermined digital indication is reached.
  • the energization of the electric contacts 17-20 is in a pushbutton manner: the pushbuttons (one of which is indicated by numeral 15 in FIG. 2) of each set are, in their turn, respectively controlled by the pivotally mounted plates 13, 14, 15, 16.
  • Each of these plates carries three fixed pins (one of which is indicated by the numeral 26 in FIG. 2), ganged in a comblike arrangement, each pin corresponding to one cam follower of the cam triplets 9, 10, 11, 12.
  • Each cam triplet 9-12 controls, through its associated pins, a corresponding plate 13-16 and thus a set of electric contacts.
  • Each cam comprises a disc with a sloping groove 21 engaging a pin of the swinging plate.
  • cams of the cam triplet each engage in the same manner the three pins of one plate for one and only one position of the three shafts 2, 3, 4 or for one and only one digital combination.
  • each cam can be keyed to its respective shaft by placing the groove 21 in registry with any one of the ten digits of the number disc, the result is that each swinging plate and thus each set of electric contacts can be actuated, or it can change its position, in correspondence with any value of the digital indication from 000 to 999 inclusive.
  • each cam is integral with a drum bearing digits from 0 to 9 so that when the device is reset (digital indication 000 on discs 5, 6 and 7) on each of the four cam triplets there is a direct reading of the combination at which the respective contact set is operated.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Transmission Devices (AREA)
  • Mechanically-Actuated Valves (AREA)
US05/668,805 1975-03-20 1976-03-19 Control device for a valve actuator Expired - Lifetime US4135661A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT21453A/75 1975-03-20
IT21453/75A IT1034429B (it) 1975-03-20 1975-03-20 Dispositivo di controllo per attuatori

Publications (1)

Publication Number Publication Date
US4135661A true US4135661A (en) 1979-01-23

Family

ID=11181990

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/668,805 Expired - Lifetime US4135661A (en) 1975-03-20 1976-03-19 Control device for a valve actuator

Country Status (6)

Country Link
US (1) US4135661A (hu)
DE (1) DE2611481C3 (hu)
ES (1) ES446452A1 (hu)
FR (1) FR2304968A1 (hu)
GB (1) GB1526006A (hu)
IT (1) IT1034429B (hu)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190643A (en) * 1992-01-10 1993-03-02 Mr. Coffee, Inc. Water treatment device having means to count times used and limit useage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200486B (en) * 1987-01-31 1990-12-19 Birt Electronic Systems Limite Multiple revolution angle sensor unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581859A (en) * 1950-06-27 1952-01-08 Veeder Root Inc Predetermining counter with resetting controlled switch closing means
US2764350A (en) * 1953-01-05 1956-09-25 Durant Mfg Co Predetermining counters
US3182908A (en) * 1961-11-30 1965-05-11 Wahli Ag W Control device
US3205651A (en) * 1965-09-14 Switch actuating time clock with intermittent clutch drive
US3974962A (en) * 1974-10-25 1976-08-17 Quaker City Gear Works, Inc. Position limiting switch assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205651A (en) * 1965-09-14 Switch actuating time clock with intermittent clutch drive
US2581859A (en) * 1950-06-27 1952-01-08 Veeder Root Inc Predetermining counter with resetting controlled switch closing means
US2764350A (en) * 1953-01-05 1956-09-25 Durant Mfg Co Predetermining counters
US3182908A (en) * 1961-11-30 1965-05-11 Wahli Ag W Control device
US3974962A (en) * 1974-10-25 1976-08-17 Quaker City Gear Works, Inc. Position limiting switch assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190643A (en) * 1992-01-10 1993-03-02 Mr. Coffee, Inc. Water treatment device having means to count times used and limit useage

Also Published As

Publication number Publication date
FR2304968B1 (hu) 1979-04-20
IT1034429B (it) 1979-09-10
FR2304968A1 (fr) 1976-10-15
DE2611481B2 (de) 1978-07-20
DE2611481A1 (de) 1976-09-23
ES446452A1 (es) 1977-06-16
GB1526006A (en) 1978-09-27
DE2611481C3 (de) 1979-03-22

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